The otters hit their toys against the walls of the tank in front of the happy visitors.
这些海獭还用它们的玩具去打击水池中的墙壁，以此来娱乐站在它们面前观看的游客。
2
Current profile extrusion practice typically involves dry calibration tables, which can be 30 ft or more long, in front of a water immersion tank with form guides under low vacuum.
目前，型材挤出实践包括干标定台，它有30多英尺长，位于浸渍水箱的前部，结构导轨处于负压。
3
Heating pipe for fuel oil tank leaked on the flange position which under the floor front the boiler, to be renewed.